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Discussion Starter · #1 ·
I have a 27 inch razor led light system an was wondering.. is it the blue lights or white lights that make corals grow?
 

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Watchful Goby
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No question is dumb!

"White" light contains all colours of light, including blue. Blue is specifically what corals like best, so both make corals grow but pure blue does a better job.
 
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